Multi-way valve

Abstract

The utility model provides a multi-way valve which comprises a valve seat, a valve core, a valve core, a valve core and a valve core. The valve element assembly abuts against the valve seat and can rotate relative to the valve seat, the valve element assembly comprises a valve disc and a sealing gasket, the sealing gasket is located between the valve disc and the valve seat, a flow channel through hole used for being communicated with a flow channel of the valve seat is formed in the sealing gasket, and an antifriction layer is arranged on the surface of the side, facing the valve seat, of the sealing gasket; the partition wall is provided with a top and a guide part, the top abuts against the sealing gasket, and in the rotating process of the valve element assembly, the edge, corresponding to the runner through hole, of the sealing gasket is guided by the guide part to pass through the top. The guide part is arranged on the partition wall, the sealing gasket can be guided to drive the antifriction layer to pass through the partition wall, the partition wall cannot rub the edge of the sealing gasket, and the problems that the sealing gasket or the antifriction layer is stirred by the partition wall of the valve seat, and consequently the sealing gasket or the antifriction layer is warped, broken and the like are solved.

Description

Technical Field

[0001] The utility model relates to the field of flow control, in particular to a multi-way valve. Background Art

[0002] In the field of flow control technology, a multi-way valve can replace multiple valves to achieve multi-way switching and meet different application requirements.

[0003] In order to control the on and off of multiple flow paths, the multi-way valve switches the internal flow paths in different modes through the relative rotation of the valve core and the valve body shell, and it is necessary to ensure the sealing between different flow paths and during the switching process. The existing multi-way valve uses a sealing gasket made of soft rubber and wear-resistant plastic laminated by interference fit to seal, and a friction-reducing layer is provided on the sealing gasket. When working in a complex environment for a long time, the friction-reducing layer on the sealing gasket has failure problems such as warping and cracking, causing the valve body to be unable to continue to work normally. Summary of the invention

[0004] The utility model aims to provide a multi-way valve which is reliable in use.

[0005] To achieve one of the above-mentioned purposes of the utility model, the utility model provides a multi-way valve, comprising: a valve seat, the valve seat comprising a partition wall for separating and forming a plurality of valve seat flow channels; and

[0006] A valve core assembly, the valve core assembly abuts against the valve seat and can rotate relative to the valve seat, wherein the valve core assembly includes a valve disc and a sealing gasket, the sealing gasket is located between the valve disc and the valve seat, the sealing gasket is provided with a flow channel through hole for connecting to the valve seat flow channel, and the surface of the sealing gasket facing the valve seat is provided with a friction reducing layer;

[0007] The partition wall has a top and a guide portion, the top abuts against the sealing gasket, and during the rotation of the valve core assembly, the edge of the sealing gasket corresponding to the flow channel through hole is guided by the guide portion to rotate over the top.

[0008] As a further improvement of an embodiment of the utility model, the friction-reducing layer is constructed as a film, and the film is attached to the sealing gasket.

[0009] As a further improvement of an embodiment of the utility model, the guide portion has a slope and / or a curved surface; the inclination angle of the slope relative to the surface of the sealing gasket facing the valve seat is less than or equal to 45 degrees.

[0010] As a further improvement of an embodiment of the utility model, the guide portion includes a guide rib protruding from the partition wall toward the corresponding valve seat flow channel, and the guide rib forms a guide surface toward one end of the sealing gasket.

[0011] As a further improvement of an embodiment of the utility model, the partition wall has an end surface facing the sealing gasket, the end surface is a plane or a curved surface, and the partition wall also includes a connecting surface for transitionally connecting the end surface and the guide surface.

[0012] As a further improvement of an implementation manner of the utility model, the connecting surface and the guiding surface are coplanar.

[0013] As a further improvement of an embodiment of the utility model, the guide rib protrudes in a direction perpendicular to the partition wall; a plurality of the guide ribs are provided on one side of at least one partition wall, and the plurality of guide ribs are arranged at radial intervals along the valve seat, and two adjacent guide ribs are connected by a transition surface, and the transition surface is constructed as a circular arc surface.

[0014] As a further improvement of an implementation mode of the utility model, the guide ribs are respectively provided on both sides of each partition wall, and the guide ribs on both sides of the same partition wall are staggered along the radial position of the valve seat.

[0015] As a further improvement of an embodiment of the utility model, the guide ribs are respectively provided on both sides of each partition wall, and the guide ribs on both sides of each valve seat flow channel are staggered along the radial position of the valve seat.

[0016] As a further improvement of one embodiment of the utility model, the multiple valve seat flow channels include a first valve seat flow channel and a second valve seat flow channel, the cross-sectional area of ​​the first valve seat flow channel is greater than the cross-sectional area of ​​the second valve seat flow channel, and the number of guide ribs corresponding to the first valve seat flow channel is greater than the number of guide ribs corresponding to the second valve seat flow channel.

[0017] As a further improvement of one embodiment of the utility model, the sealing gasket is provided with a flow channel hole for connecting to the valve seat flow channel, the flow channel hole forms a flange toward the edge of the partition wall, the flange is inclined toward the side away from the partition wall, and the film is arranged in contact with the flange.

[0018] Compared with the prior art, the beneficial effect of the utility model lies in that: by arranging a guide portion on the partition wall, the sealing gasket can be guided to drive the friction-reducing layer to rotate over the partition wall, and the partition wall will not be scratched with the edge of the flow channel through hole corresponding to the sealing gasket, thereby avoiding the problem of warping, cracking and other failures caused by the edge of the flow channel through hole corresponding to the sealing gasket or the friction-reducing layer being moved by the partition wall of the valve seat, thereby improving the service life of the multi-way valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a cross-sectional schematic diagram of a multi-way valve according to one embodiment of the utility model.

[0020] Figure 2 yes Figure 1 A three-dimensional schematic diagram of the valve seat of the multi-way valve.

[0021] Figure 3 yes Figure 2 An enlarged schematic diagram of part a of the multi-way valve in FIG.

[0022] Figure 4 yes Figure 2 Schematic cross-sectional view of the multi-way valve along line AA.

[0023] Figure 5 yes Figure 4 An enlarged schematic diagram of part b of the multi-way valve.

[0024] Figure 6 yes Figure 2 Schematic diagram of a top view of a multi-way valve.

[0025] Figure 7 yes Figure 6 Schematic cross-sectional view of the multi-way valve along line BB.

[0026] Figure 8 yes Figure 7 An enlarged schematic diagram of part c of the multi-way valve. DETAILED DESCRIPTION

[0027] The present invention will be described in detail below in conjunction with the specific embodiments shown in the accompanying drawings. However, these embodiments do not limit the present invention, and any structural, methodological, or functional changes made by a person skilled in the art based on these embodiments are all within the scope of protection of the present invention.

[0028] It should be understood that the terms used herein, such as "upper", "above", "lower", "below", etc., indicating spatial relative positions, are used for the purpose of convenience to describe the relationship of one unit or feature relative to another unit or feature as shown in the drawings. The terms of spatial relative positions may be intended to include different orientations of the device in use or operation other than the orientation shown in the drawings.

[0029] The multi-way valve in the specific implementation mode of the utility model refers to Figures 1 to 4 As shown, the multi-way valve includes a valve seat 10 and a valve core assembly, the valve seat 10 includes a partition wall 12 that separates and forms a plurality of valve seat flow channels 11a, 11b; the valve core assembly abuts against the valve seat 10 and can rotate relative to the valve seat 10. The valve core assembly is provided with a valve core flow channel, and the rotation of the valve core assembly relative to the valve seat 10 can make the valve core flow channel communicate with different valve seat flow channels 11a, 11b, thereby realizing the switching of the flow path. The valve core assembly can be driven to rotate by a driving mechanism, and driven by the driving mechanism, the valve core assembly can be driven to rotate to multiple positions, each position corresponding to a different flow path, so that the flow mode can be switched.

[0030] The valve core assembly includes a valve disc 20 and a sealing gasket 30. The sealing gasket 30 is located between the valve disc 20 and the valve seat 10. The sealing gasket 30 is provided with a flow channel through hole 21 for connecting the valve seat flow channels 11a and 11b. The surface of the sealing gasket 30 facing the valve seat 10 is provided with a friction-reducing layer 40. The sealing gasket 30 is used to improve the sealing performance of the multi-way valve. Since the sealing gasket 30 needs to rotate relative to the valve seat 10, the friction-reducing layer 40 is provided on one side surface of the sealing gasket 30, which can reduce the friction resistance of the sealing gasket 30 relative to the valve seat 10 when rotating, reduce the workload of the driving mechanism, and thus extend the service life of the multi-way valve.

[0031] Furthermore, the partition wall 12 has a top 121 and a guide portion 13, and the top 121 abuts against the sealing gasket 30. During the rotation of the valve core assembly, the edge of the flow channel through hole 21 of the sealing gasket 30 is guided by the guide portion 13 to rotate over the top 121. The end of the partition wall 12 facing the sealing gasket 30 is the top 121. By providing the guide portion 13 on the partition wall 12, the sealing gasket 30 can be guided to drive the friction reduction layer 40 to rotate over the partition wall 12. The partition wall 12 will not be scratched by the edge of the flow channel through hole 21 corresponding to the sealing gasket 30 or the friction reduction layer 40, causing the sealing gasket 30 or the friction reduction layer 40 to warp, thereby avoiding the sealing gasket 30 or the friction reduction layer 40 being moved by the partition wall 12 of the valve seat 10, resulting in warping, rupture and other failure problems.

[0032] In this embodiment, the friction-reducing layer 40 is constructed as a thin film, and the thin film is attached to the sealing gasket 30. The thin film can be a PTFE film, an ETFE film, an FEP film, a PFA film, a PVDF film, etc. The thin film can be attached to the sealing gasket 30 by an adhesive, or can be formed on the sealing gasket 30 by other processes. The thin film is attached to the sealing gasket 30, and the guide portion 13 guides the sealing gasket 30 and can guide the thin film to rotate through the partition wall 12, thereby preventing the edge of the film corresponding to the flow channel through hole 21 from being moved by the partition wall 12 and causing warping or rupture.

[0033] The film is provided with a flow channel opening 41, which corresponds to the flow channel through hole 21. The edge of the flow channel through hole 21 facing the partition wall 12 is formed with a flange 22, which is inclined toward the side away from the partition wall 12, and the film is arranged in contact with the flange 22. The film is bent in the direction away from the partition wall 12 to prevent the edge of the film corresponding to the flow channel through hole 21 from directly contacting and colliding with the guide part 13, thereby preventing the edge of the film corresponding to the flow channel through hole 21 from being lifted due to force.

[0034] In order to guide the sealing gasket 30 more smoothly, the surface of the guide portion 13 facing the sealing gasket 30 is set to be an inclined surface or a curved surface, or a combination of an inclined surface and a curved surface. The surface of the guide portion 13 facing the sealing gasket 30 forms a guide surface 132 for guiding the sealing gasket 30. The guide surface 132 has no edges and corners and thus will not scratch the sealing gasket 30 or the friction reduction layer 40, so that the sealing gasket 30 drives the friction reduction layer 40 to rotate through the partition wall 12 more easily.

[0035] In this embodiment, the guide portion 13 has an inclined surface, and the inclination angle of the inclined surface relative to the surface of the sealing gasket 30 facing the valve seat 10 is less than or equal to 45 degrees, which can reduce the resistance when the sealing gasket 30 or the friction-reducing layer 40 contacts the partition wall 12 to generate dynamic friction, so that the sealing gasket 30 can more smoothly drive the friction-reducing layer 40 to cross the partition wall 12. Of course, the guide portion 13 can also include a combination of an inclined surface and a curved surface, or the guide portion 13 has a curved surface. The guide portion 13 can include any smooth surface with a guiding function.

[0036] Further, the guide portion 13 includes a guide rib 133 protruding from the partition wall 12 toward the corresponding valve seat flow channel 11a, 11b, and the guide rib 133 forms a guide surface at one end facing the sealing gasket 30. The guide rib 133 protruding into the valve seat flow channel 11a, 11b is provided, and the guide surface 132 is located on the guide rib 133. The guide surface 132 of the guide rib 133 can bear a larger interference of the sealing gasket 30, thereby ensuring a better sealing effect while reducing the adverse effect caused by the collapse of the sealing gasket 30.

[0037] Reference Figure 3 and Figure 5 The partition wall 12 has an end face 122 facing the sealing gasket 30, and the end face 122 is a plane or an arc surface. The partition wall 12 also includes a connecting surface 124 for transitionally connecting the end face 122 and the guide surface. The guide surface 132 and the end face 122 are transitionally connected through the connecting surface 124, so that the sealing gasket 30 can pass over the partition wall 12 more smoothly during rotation.

[0038] The connecting surface 124 and the guide surface 132 are coplanar, so that when the sealing gasket 30 rotates over the partition wall 12, there will be no abrupt feeling when it passes over the partition wall 12 along the guide surface 132, and it can smoothly pass over the partition wall 12 with less friction resistance. The connecting surface 124 and the guide surface 132 are both constructed as inclined surfaces, the surface of the guide portion 13 facing the sealing gasket 30 is constructed as an inclined surface, and the connecting surface 124 of the guide surface 132 and the end surface 122 is also an inclined surface, and these two inclined surfaces are coplanar. The connecting surface 124 and the guide surface 132 can also be constructed as the same arc surface, and it can also be considered that the connecting surface 124 and the guide surface 132 are coplanar, and the arc surface can make the process of the sealing gasket 30 rotating over the partition wall 12 smoother.

[0039] In this embodiment, the guide rib 133 protrudes in a direction perpendicular to the partition wall 12. The guide rib 133 can be integrally formed with the partition wall 12, making the valve seat 10 more convenient to manufacture. Moreover, the arrangement of the guide rib 133 perpendicular to the partition wall 12 can reduce the resistance generated when the guide rib 133 contacts the sealing gasket 30 while bearing a larger interference amount of the sealing gasket 30, thereby preventing the sealing gasket 30 from collapsing.

[0040] Continue to refer to Figure 2 and Figure 6 , at least one side of the partition wall 12 is provided with a plurality of guide ribs 133, and the plurality of guide ribs 133 are arranged at intervals along the radial direction of the valve seat 10, and two adjacent guide ribs 133 are connected by a transition surface 135, and the transition surface 135 is constructed as an arc surface. The plurality of guide ribs 133 can make the partition wall 12 have multiple bearing positions in the radial direction, and can more stably bear the sealing gasket 30. The arc transition surface 135 between the two adjacent guide ribs 133 can reduce the wall thickness of the partition wall 12, facilitate injection molding, reduce the weight of the valve seat 10, avoid the problem of poor injection molding due to uneven wall thickness, and reduce the flow resistance of the liquid flowing through the valve seat flow channels 11a and 11b. The number of guide ribs 133 on the partition walls 12 on both sides of the same valve seat flow channel 11a and 11b can be set to be the same, so that when the sealing gasket 30 rotates to both sides, the force carried by the guide ribs 133 is roughly equal, ensuring that the sealing gasket 30 is more stable when rotating in different directions.

[0041] Wherein, guide ribs 133 are respectively arranged on both sides of each partition wall 12, and the guide ribs 133 on both sides of the same partition wall 12 are staggered along the radial position of the valve seat 10. The staggered arrangement of the guide ribs 133 on both sides of the partition wall 12 facilitates injection molding, reduces the wall thickness of the partition wall 12, and thus avoids problems during the injection molding process. The inclination angles of the inclined surfaces on the guide ribs 133 on both sides of the same partition wall 12 are set to be the same, ensuring that the sealing gasket 30 is subjected to the same force when rotating in different directions. In addition, the guide ribs 133 on both sides of each valve seat flow channel 11a, 11b are staggered along the radial position of the valve seat 10, that is, the guide ribs 133 on the opposite sides of the two adjacent partition walls 12 are staggered along the radial position of the valve seat 10, which can increase the cross-sectional area of ​​the valve seat flow channels 11a, 11b at the guide ribs 133, thereby reducing the flow resistance of the liquid flowing through the valve seat flow channels 11a, 11b.

[0042] In this embodiment, the plurality of valve seat flow channels 11a and 11b include a first valve seat flow channel 11a and a second valve seat flow channel 11a, the cross-sectional area of ​​the first valve seat flow channel 11a is greater than the cross-sectional area of ​​the second valve seat flow channel 11b, and the number of guide ribs 133 corresponding to the first valve seat flow channel 11a is greater than the number of guide ribs 133 corresponding to the second valve seat flow channel 11b. A valve seat flow channel with a smaller cross-sectional area is provided with a relatively small number of guide ribs 133, which can reduce the flow resistance of the liquid flowing through the valve seat flow channel.

[0043] Reference Figure 7 and Figure 8 The sealing gasket 30 and the valve seat 10 are in interference fit, the sealing gasket 30 is elastic, and the positional relationship between the sealing gasket 30 and the partition wall 12 in the vertical direction is as follows: Figure 8 When the sealing gasket 30 rotates counterclockwise, the flange 22 of the sealing gasket 30 will contact the guide portion 13 of the partition wall 12 at the position facing the outside of the partition wall 12. At this time, the guide surface 132 of the guide portion 13 plays a guiding role, guiding the flange 22 of the sealing gasket 30 to rotate through the partition wall 12 toward the outside of the partition wall 12 without rubbing against the edge of the sealing gasket 30 or the flow channel through hole 21 corresponding to the film, causing the sealing gasket 30 or the film to warp.

[0044] The multi-way valve in the specific embodiment of the utility model can guide the sealing gasket 30 to drive the friction-reducing layer 10 to rotate through the partition wall 12 by providing a guide portion 13 on the partition wall 12. The partition wall 12 will not be scratched by the edge of the flow channel through hole 21 corresponding to the sealing gasket 30 or the friction-reducing layer 40, causing the sealing gasket 30 or the friction-reducing layer 40 to warp, thereby avoiding the problem of failure such as warping and cracking caused by the edge of the flow channel through hole 21 corresponding to the sealing gasket 30 or the friction-reducing layer 40 being moved by the partition wall 12 of the valve seat 10, and the service life of the multi-way valve is extended.

[0045] It should be understood that although this specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each implementation mode may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0046] The series of detailed descriptions listed above are only specific descriptions of feasible implementation methods of the utility model. They are not intended to limit the protection scope of the utility model. Any equivalent implementation methods or changes that do not deviate from the technical spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A multi-way valve, comprising: A valve seat, the valve seat comprising a partition wall for forming a plurality of valve seat flow channels; and A valve core assembly, the valve core assembly abuts against the valve seat and can rotate relative to the valve seat, wherein the valve core assembly includes a valve disc and a sealing gasket, the sealing gasket is located between the valve disc and the valve seat, the sealing gasket is provided with a flow channel through hole for connecting to the valve seat flow channel, and the surface of the sealing gasket facing the valve seat is provided with a friction reducing layer; It is characterized in that The partition wall has a top and a guide portion, the top abuts against the sealing gasket, and during the rotation of the valve core assembly, the edge of the sealing gasket corresponding to the flow channel through hole is guided by the guide portion to rotate over the top.

2. The multi-way valve according to claim 1, characterized in that: The friction-reducing layer is configured as a film, and the film is attached to the sealing gasket.

3. The multi-way valve according to claim 1 or 2, characterized in that: The guide portion has an inclined surface and / or an arc surface; the inclination angle of the inclined surface relative to the surface of the sealing gasket on the side facing the valve seat is less than or equal to 45 degrees.

4. The multi-way valve according to claim 1 or 2, characterized in that: The guide portion includes a guide rib protruding from the partition wall toward the corresponding valve seat flow channel, and the guide rib forms a guide surface toward one end of the sealing gasket.

5. The multi-way valve according to claim 4, characterized in that: The partition wall has an end surface facing the sealing gasket, and the end surface is a plane or a curved surface. The partition wall also includes a connecting surface for transitionally connecting the end surface and the guide surface; the connecting surface and the guide surface are coplanar.

6. The multi-way valve according to claim 4, characterized in that: The guide ribs protrude in a direction perpendicular to the partition wall; a plurality of the guide ribs are provided on one side of at least one partition wall, the plurality of guide ribs are arranged at intervals along the radial direction of the valve seat, and two adjacent guide ribs are connected by a transition surface, and the transition surface is constructed as an arc surface.

7. The multi-way valve according to claim 6, characterized in that: The guide ribs are respectively arranged on both sides of each partition wall, and the guide ribs on both sides of the same partition wall are staggered along the radial position of the valve seat.

8. The multi-way valve according to claim 6, characterized in that: The guide ribs are respectively arranged on both sides of each partition wall, and the guide ribs on both sides of each valve seat flow channel are staggered along the radial position of the valve seat.

9. The multi-way valve according to claim 6, characterized in that: The multiple valve seat flow channels include a first valve seat flow channel and a second valve seat flow channel, the cross-sectional area of ​​the first valve seat flow channel is greater than the cross-sectional area of ​​the second valve seat flow channel, and the number of guide ribs corresponding to the first valve seat flow channel is greater than the number of guide ribs corresponding to the second valve seat flow channel.

10. The multi-way valve according to claim 2, characterized in that: The sealing gasket is provided with a flow channel through hole for connecting to the valve seat flow channel, the flow channel through hole forms a flange towards the edge of the partition wall, the flange is inclined towards the side away from the partition wall, and the film is arranged in contact with the flange.

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